Wait, what? You can convert the iPod dock to USB? What does one get - charging only, or audio too?
That said, I have found a good windshield (suction) phone mount that puts the phone in a really good place, visually. The down-side is that I have stringy cables between it and an Accessory outlet USB charger, and depend on Bluetooth for the audio side (and the BT module in the car is starting to get flaky). I have the original JVC Kenwood NXD505 Audio / Nav unit.